Mathematics
achille hui's user avatar
achille hui's user avatar
achille hui's user avatar
achille hui
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Look deep into my icon, you will see the answer.

Take a prime that's not a prime, what needs to make it ninety nine.

L'enfer est plein de bonnes volontés ou désirs - sci.math has been killed by crackpots, I predict math.SE will be killed by over-spontaneous-moderation (2018/12/10)

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answer
101
Conjecture $\int_0^1\frac{\mathrm dx}{\sqrt{1-x}\ \sqrt[4]x\ \sqrt[4]{2-x\,\sqrt3}}\stackrel?=\frac{2\,\sqrt2}{3\,\sqrt[8]3}\pi$
Oct 31, 2013
answer
74
Is $0.1010010001000010000010000001 \ldots$ transcendental?
May 5, 2014
answer
70
Does non-symmetric positive definite matrix have positive eigenvalues?
Mar 9, 2013
answer
70
Integral $\int_0^1\frac{\ln\left(x+\sqrt2\right)}{\sqrt{2-x}\,\sqrt{1-x}\,\sqrt{\vphantom{1}x}}\mathrm dx$
Mar 15, 2014
answer
65
What are some examples of mathematics that had unintended useful applications much later?
Sep 7, 2013
answer
57
Conjecture $\int_0^1\frac{dx}{\sqrt[3]x\,\sqrt[6]{1-x}\,\sqrt{1-x\left(\sqrt{6}\sqrt{12+7\sqrt3}-3\sqrt3-6\right)^2}}=\frac\pi9(3+\sqrt2\sqrt[4]{27})$
Feb 28, 2014
answer
53
Find $xy+yz+zx$ given systems of three homogenous quadratic equations for $x, y, z$
Feb 9, 2018
answer
52
Why does Wolframalpha think that this sum converges?
Mar 1, 2016
answer
49
Is there a fast way to prove a symmetric tridiagonal matrix is positive definite?
May 11, 2018
answer
48
Prove that there exists a triangle which can be cut into 2005 congruent triangles.
Nov 26, 2018
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